EP 0048589 B1 19870311 - TANK CONTENTS GAUGE
Title (en)
TANK CONTENTS GAUGE
Publication
Application
Priority
GB 8030336 A 19800919
Abstract (en)
[origin: US4669309A] A tank contents gauge is disclosed having two pressure sensors to sense the liquid pressure at two tank positions at known vertical separation, a port to sense the ambient pressure in the tank, and a transducer to which the three pressure readings are transmitted one at a time by a switching mechanism. If the transducer is a differential transducer, its second side is connected to the port to allow (1) comparison of the pressure readings with the ambient pressure reading and (2) determination of transducer offset to adjust the calculations to give accurate readings. The readings are analysed by a data processing system which can provide volume and weight readings by internal look-up calibration tables. The system may also control the switching mechanism. Specific gravity values can be calculated from the pressure readings and the known vertical separation; the values can be stored in the system for use when the tank contents approaches, or falls below, the level of the upper sensor.
IPC 1-7
IPC 8 full level
G01F 23/14 (2006.01)
CPC (source: EP US)
G01F 23/14 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0048589 A1 19820331; EP 0048589 B1 19870311; AT E25876 T1 19870315; DE 3175977 D1 19870416; US 4669309 A 19870602
DOCDB simple family (application)
EP 81304233 A 19810916; AT 81304233 T 19810916; DE 3175977 T 19810916; US 57526884 A 19840130